Encyclopedia > Port (computing)

  Article Content

Port (computing)

In computing, port has three meanings:

A hardware port is an outlet on a piece of equipment into which a plug or cable connects. For instance, a computer may have a keyboard port, into which the keyboard is connected.

A networking port, so named by analogy with the above, is a notational point for the connection of network programs. In TCP and UDP, multiple network services running on a single host are distinguished by port numbers; the operating system kernel uses these port numbers to sort out which packets should go to which programs. A program which is using a port, whether to await connections (i.e. to be a server) or to make connections, is said to have a socket[?] bound to that port -- more hardware analogy. A well known port is between the range 0-1023 which were traditionally assigned by IANA. Ephemeral ports are somewhere between 1024 to 65535 depending on the implementation of the TCP/IP stack of an operating system.

List of some well known network ports:

In programming, a port is a localization or translation of a piece of software to a particular API, operating system, or generally any other computing environment than that for which it was written. See porting for detail.



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
Peyton Place

... in a Leading Role (Lana Turner), Best Actress in a Supporting Role (Hope Lange), Best Actress in a Supporting Role (Diane Varsi), Best Cinematography, Best Director, Best ...